Which has more atoms: a 1g sample of Carbon-12 or a 1g sample of Carbon-14?

Answer 1

The 12 and 14 refer to the mass of the isotopes. Carbon-12 is a lighter isotope. So, it would take more atoms of Carbon-12 to make one gram. You could do a dimensional analysis problem using avagadro's number to prove this. But, this seems like a conceptual question.